Yielding driving connection.



G. LANE.

YIBLDING DRIVING CONNECTION.

APPLICATION FILED APB..24, 1912.

Patented June 3, 1913.

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Gveorzge Lane 3%, WW

UNITED STATES PATENT OFFICE.

GEORGE LANE, OF POUGHKEEPSIE, NEW YORK, ASSIGNOB TO LANE BROTHERS COMPANY, A CORPORATION OF NEW YORK.

YIELIDI'NG nnrvmo comac'rron.

Specification of Letters Patent.

Patented June a, 1913.

Application flledbpril 24, 1912. Serial Roi 691979..

anism for automatically disconnecting the driving mechanism from the rotary disk, in case a hard obstruction happens to enter the mill, and second, to means connected with the same driving shaft, for adjusting the grinding disks in relation to each other.

The object of my said invention is to simplify both devices and to-increase their.

certainty and efiiciency in action.

My said invention is illustrated in the accompanying drawings, in which Figure 1 is a vertical sectional view through a mill embodying my invention; Fig. 2 is a sectional view through the driving means for the rotary disk, this section being taken transversely of the driving shaft. In these 'drawlngs a mill .is shown, for example, consisting of two grinding parts,

a fixed disk A, and a rotary disk B. The

disk A is fixed to the frame or casing of the mill. The rotary disk B is fixed by screws bothe flange b of a hub or collar 6" loosely mounted on the driving shaft C, between a cotter pin 0 and an arm D, which is fixed to the shaft by set screw (1. On the rear face of the' rotary grinding disk B there is a boss 3 set in the path of adriving dog carried by the arm D, whereby the disk B will be rotated when the dog, in the revolution of the shaft C, is in contact with the boss. This dog consists of a member 4 extending laterally from a shank portion or rock-shaftpart 5 which is adapted to turn in a socket 7 in the arm D. wherein it is held by a cotter pin 6 fitting in a groove 8 of the said shank.

On the arm D, and at right angles thereto,-

is a boss 9, bored to receive a head 10, the stem 11 of which extends into a hollow cap 12, threaded into the end of the boss 9.

Around the stem-is a spring arranged to ear upon the cap, and upon the head 10.

his head is therefore pressed upon a flattened side of the shank 5, as shown at-13. This gives a yielding hold upon the shank,

sutlicient to maintain the in normal position, and to cause the rotary disk to revolve in ordinary work. But when an obstruction, such as a screw, for example, get's'into the mill; such obstruction will check the move ment, and the dog will turnaside the Hat face of the shank working against the head which yields, because it is backed by the spring The dog remains'out of range of the boss, and the shaft may then 'run freely without possibility of damage. The pressure of the head upon the shank may be adjusted by the screw.

The casing of the mill is-m'ade, as usual, removable or wlth a removable portion, so that the foreign body may be removed and the dog may be returned into-operative posi- ,tlon. The casing also carries the adjusting mechanism whereby the shaft of the mill which carries thedog, and the'rotary disk,

A boss 15 on thecasing, bored axially with the shaft, carries a brass bearing 16, for the shaft C, which is reduced and shouldered at its end, and bears on a thrust bearing comprising an antifriction two-part collar 18, containing an annular channel and antifriction rollers 19, on the end of which bears a hollow nut. 20. This nut is threaded externally, and is screwed This serves to hold the hollow.

maybe adjusted to vary the distance between the disks.

stood that the shaft C has a'tongue c to engage a notch in the end of a motor shaft, so that the longitudinal adjustment of the mill shaft cantake place, as just stated. Bet-ween the motor shaft and the mill shaft a spring, is arranged tending to push them apart, and keeping the opposite end of the mill shaft back against the thrust hearing. The cotter pin a, which bears a ainst the hub or collar b' of the rotary grin 'ng plate thus keeps thls plate pushed back so that the disks Will not rub to other when the mill i running idle, that Is, when coffee is not being ground. 7

I claim as my invention, substantially, as described Q 1. In apparatus of the class described a rotary member to be driven, a shaft on which said member is loosely mounted, a driving dog'engaging the rotary member, said dog having a rotatable shank, ayielding member bearing on the shank to hold it frictionally against turning, a carrier for the said shank and yielding member, said carrier consisting of an arm fitted to the exterior of-the shaft and extending radially, .with the'dog at its outer end, and means for attaching the same at the desired point on the shaft, substantially as described.

2. In apparatus of the class described a. rotary member to be driven, a shaft on which said rotary member is loosely mounted, a driving dog for the rotary member, said dog having a rotatable shank, a yieldin member bearing on the shank to hold it agamstturning, a carrier for the said shank and yielding member consisting of an arm fitted to the exterior of the shaft, means for securing the arm to the shaft, and means for adjusting the tension of the yielding member also mounted on the carrier, substantially as described.

In testimony whereof, I aflix my signature in presence of two witnesses.

GEORGE LANE.

Witnesses:

WM. CoUcH, F. EUGENE DAVIS. 

